Textile fabric



Patented July 2, 1935 UNITED STATES,

PATENT OFFICE Serial N 0. 444,819.

Divided and this application February 1, 1934, Serial No. 709,331. InGreat Britain April 29, 1929 Claims. (01. 117-52) This application is adivisional application from application S. No. 444,619 filed 15th April,1930, and the invention relates to the production of textile fabrics,and more particularly woven 5 fabrics.

The object of the invention is to simplify or improve the production ofcrepe-like or "flgured or pebbled effects in woven fabrics.

The. method of producing crepe fabrics as ordinarily practised consistsin employing as weft or both weft and warp two kinds of thread, eachhighly twisted, the twist of one being in the opposite direction to thatof the other. These twothreads alternate with each other in the fabric,the usual arrangements beingeither one thread of one kind alternatingwith a thread of the other kind, or an alternation of pairs of likethreads, and in either of these arrangements, each weft thread iscontained in a separate shed. After the fabric is woven, it is subjectedto shrinking, and the consequent contraction of the high twist threadsproduces the crepe effect re; quired.

According to the present invention, crepe or like effects are producedby the use of a composite thread consisting solely of two threads, atleast one of which is highly twisted. Preferably both are highlytwisted, but in opposite directions. The high twist threads may bedoubled with low twist threads before their association into thecomposite threads.

For use as weft, the two threads may be simply parallel wound on to aweft pim or other weft package. They may be sized together beforewinding, if desired. The two threads may be doubled together, this formof composite thread being capable of use both as a weft and as a warpthread.

A preferred form of composite thread, capable of use both as weft andwarp, consists of two threads highly twisted in opposite directions, anddoubled together. The doubling should be light in comparison with thedegree of twist imparted to each thread.

The invention may be used for the production of crepe-like effects inall kinds of materials. Thus, the component threads may consist oflilaments of cellulose acetate or other organic derivatives ofcellulose, which materials do not give good crepe effects by the normalmethods employed. Likewise, threads of natural silk, cotton, wool, orartificial silk of the reconstituted cellulose type may be used, thecrpe effect being evident immediately on weaving the fabric. If desired,shrinking may be resorted to to enhance the creping of the fabric.

The component threads in the composite threads may be of like or unlikecounts or denier, colour, or composition. Thus, for example, a 5composite thread may consist of one thread of cellulose acetate, and onethread of natural silk, cotton, or wool.

By the use of composite threads according to the invention, it is notnecessary to employ a 10 multi-box loom-in order to produce thecrepelike effects, since the effect produced does not depend on the useof two kinds of weft thread.

It is, however, within the scope of the invention to use two kinds ofcomposite thread, of the same 15 or different composition, one threadbeing doubled in the opposite direction to the other, in which case atwo-box loom is necessary for the weaving of the fabric. Again,shrinking of the fabric may be resorted to, particularly when the 20fabrics consist of or contain materials which are normally subjected toshrinking in ordinary crping processes.

The following are given as examples of composite threads which areparticularly suitable for 25 producing crepe effects in fabrics ofcellulose acetate, but it is to be understood that the invention is notin any way limited thereby.

Example I A composite thread is formed from two 75 denier threads ofcellulose acetate, one'having turns per inch of left-hand twist and theother 55 turns per inch of right-hand twist. The two threads are doubledtogether with 10-12 turns per 35 'inch in either direction.

Example II p A composite threadconsisting of a 100 denier thread ofcellulose acetate having turns per 40, inch ofright-hand twist and adenier cellulose acetate thread having 40 .turns per inch of lefthandtwist, the two threads-being doubled together with 20 turns perinch ofleft-hand twist.

This thread may be used alone in a single-box 45 loom, or in a two-boxloom alternately with another composite thread consisting of a deniercellulose acetate thread having 60 turns per inch of left-hand-twist anda 70 denier cellulose acetate thread having 40 turns per inch of right-50 hand twist, doubled together with 20 turns per inch of right-handtwist.

The threads described in the above examples may be used as weft or warpalone or as both warp and weft to give excellent crepe-like effects. n

Where the oppositely twisted threads of the second example are used, itis convenient to insert two picks of one thread alternately with twopicks of the other thread.

What I claim and desire to secure by Letters Patent is:

1. A method of weaving crepe fabric which consists in laying in a singlewarp shed separate and oppositely twisted filling ends, the separateends being non-intertwisted with one another.

2. A method of weaving crepe fabric which consists in simultaneouslywithdrawing from a single bobbin two separate and oppositely twistedfilling ends, the separate ends being non-intertwlsted with one another;and laying the non-intertwisted ends within a warp shed.

3. A method of weaving crepe fabric which consists in laying insuccessive warp sheds a pair of separate and oppositely twisted fillingends at each pick, the separate ends being non-intertwisted with oneanother.

4. A crepe fabric comprising a series of warp strands and a series ofseparate filling strands of alternately opposite twist, each shed ofwarp strands embracing two filling strands of opposite twist, the twofilling strands in each warp shed being separate from one another andnon-intertwisted.

5. A crpe fabric comprising a series of warp strands and a series ofseparate filling strands of cellulose acetate or alternately oppositetwist, each shed of warp strands embracing two filling strands ofopposite twist, the two filling strands in each warp shed being separatefrom one another and non-intertwisted.

HENRY DBEYFUS.

